RV Park All band vertical ideas.

Discussion in 'RV Operating and Camping' started by K4MMB, Feb 11, 2018.

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  1. K4MMB

    K4MMB Ham Member QRZ Page

    Trying to optimize my situation here. Fantastic place for transmit/receive. No power poles or interference but my site is not optimum.

    Not many variables so I’m stuck. Have an extremely closed in site except at tow end of forty foot trailer. Also front end is where shack is located (very short feed lines) and has a clear shot at one mile of open river.

    Cannot run out radials but can mount pipe mast from front of trailer. Have installed extra attachment points along front of trailer including towing hitch and exposed frame.

    Has anyone crossed this problem?

    I am running now a ic-746pro with a MFJ 1699 tap hole mobile antenna. Have connected trailer frame to ground for a counterpoise though not certain it is very efficient. Would like to stay with the tuner inside the Icom but not adverse to buying an auto tuner. Of course it would be great to get as many band coverages as possible.

    Am able to build and wind components for a stick and of course would prefer that to buying one of the available verticals on the market. I must admit that most of them look like there is not much magic to them. I can go up high but have the problem of easy and quick lowering as this is a windy and lightning prone area. Hindged lay down is a problem so either telescopic or lift and lay down only works.

    Appreciate anyone’s thoughts and time.

  2. KD0CAC

    KD0CAC Ham Member QRZ Page

    I'm in a RV / park also , and use Rohn telescoping masts , usually only about 15' , then on top of those I have used Cushcraft R5 & R7 [ no longer available new ] and Butternut HF-9 - this with the CPK kit [ elevated radial / or counter poise ] still available from DX Engineering .
    I guy both the mast & middle of either antenna .
    If nothing else , even just a cinderblock / or other heavy weight to tilt up & down , now getting a little older and plan on building a tilt fixture - about 1 foot stake in ground with hinge for pipe to fit inside of the bottom of mast , this makes it very controllable and not too heavy for me , yet .
  3. K4MMB

    K4MMB Ham Member QRZ Page

    Thank you for the good ideas. I’ll figure something out.
  4. K5RCD

    K5RCD XML Subscriber QRZ Page

    I use a Ameritron SDA-100 screwdriver antenna mounted on the front of the frame. It works remarkably well and is not in the way. I just remove the whip when traveling. No muss, no fuss. It works 80 through 6 meters.

    This is a photo of my previous trailer. It's mounted the same way on my new one.

    KG5TZM, KF4KUL, W7EDC and 1 other person like this.
  5. K4MMB

    K4MMB Ham Member QRZ Page

    I’m beginning to lean more towards this Tarheel type. I’m getting mixed signals on the use of the trailer frame for a radial and then to a grounding pipe vs. putting out radial wires (which I cannot do). Is this not effective at all?

    I also have a pipe frame built on the front of the trailer on which I can run up the smaller Tarheel to over the roof level. That frame I’ve also tied into the frame and ground pipe.

    All of your inputs are very much appreciated.

  6. K4MMB

    K4MMB Ham Member QRZ Page

    Hi Randy,

    Are you setting out radial wires from this or just stand alone? This would work out very well for me sans the radials. I have the grounds all running to the frame of my existing mfj 1699 and then to a ground pipe but I don’t know if it is doing any good.

  7. K5RCD

    K5RCD XML Subscriber QRZ Page

    No radials, no grounds, just using the trailer frame.

    For a lot of really good information see http://www.k0bg.com/
    N6ILJ and NX6ED like this.
  8. WU3U

    WU3U Premium Subscriber QRZ Page

    I have a Chameleon military whip, mil whip extension and capacitance hat. That all mounts to their cha hybrid coil which is connected to their stainless steel spike mount which goes down into the ground about 14” or so.

    I use 4 to 8 ground radials but you could easily connect the cha hybrid directly to your trailer or other ground.

    I’ve worked the world with this setup.

    I also have a Tarheel 200 which I occasionally setup with a ground radial plate and about 8 ground radials. It’s nice but using the Chamelion setup and and LDG tuner has proved to have nearly the exact same reach with much faster tuning.
  9. W5HAS

    W5HAS XML Subscriber QRZ Page

    Mine's kind of a pain because I have to climb the ladder on the motor home to install it, and adjust it, but I've been using a Wolf River Coil with a 102" whip mounted to the ladder top with a 3/8" mirror mount. The body/frame of the MH is the ground plane. With it I'm able to work 80 meters thru 12 meters, and if I want to work 10, I have an 80" whip I can use. For what is, I'm getting good results for no amplifier and an IC-7300.
    KI4YHX likes this.
  10. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    I don't have my motor home anymore, but for 9 years had a big one with a permanent ladder up the back, two A/C units, three crank-open skylight/vents and a TV antenna on the roof, etc. so I clamped a 3/8"-24 antenna mount to the top of the ladder and just used a Hustler fold-over aluminum mast for their screw-on coil/whip assemblies and it worked remarkably well (compared to "nothing").:p

    For driving, that was usually "folded over" to not hit tree limbs and stuff, but once parked I'd fold it up and slide the thingie that holds it that way and use their 3-way resonator adapter (which Hustler still sells, it's cheap) to screw in resonators for three or four bands, usually 15-20-30-40m. The 80m assembly is so narrowband it's frustrating; but the other ones can pretty much "cover the band" if you set it up for the middle of each band.

    I did add two copper wire radials to the mount, just laid across the fibreglas roofing material and stuck in place with duct tape, which held them on easily at 70 mph. That helped a little bit, but not all that much. The ladder was attached to the MH frame at a few points and it seemed to mostly work. Cheap solution (I think the mount, mast and four resonators may have been about $150 total or so) and made a lot of contacts.

    Nothing like firing up on the air after the family's all asleep, with a small light and a glass of good wine, note pad or small logbook, a key paddle and headphones. Never woke anyone up and caught a few good openings in the wee hours when most aren't even operating locally, but they're "awake" in other parts of the world.
    K7VGW, K3SZ and W5HAS like this.

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